/*
 * Copyright (C) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the 'License');
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an 'AS IS' BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef IMAGE_KNIFE_C_KEKE_PROMISE_H
#define IMAGE_KNIFE_C_KEKE_PROMISE_H

#include <atomic>
#include <memory>
namespace ImageKnifePro {

template <typename T>
class Promise : public std::enable_shared_from_this<Promise<T>> {
public:
    void Resolve(T value)
    {
        if (!isResolved_) {
            isResolved_ = true;
            SetValue(value);
        }
    }

    bool IsResolved() const
    {
        return isResolved_;
    }

    virtual ~Promise() = default;
private:
    virtual void SetValue(T value) = 0;
    std::atomic<bool> isResolved_ = false;
};

template <>
class Promise<void> : public std::enable_shared_from_this<Promise<void>> {
public:
    void Resolve()
    {
        if (!isResolved_) {
            isResolved_ = true;
            SetValue();
        }
    }

    bool IsResolved() const
    {
        return isResolved_;
    }

    virtual ~Promise() = default;
private:
    virtual void SetValue() = 0;
    std::atomic<bool> isResolved_ = false;
};
}

#endif //IMAGE_KNIFE_C_KEKE_PROMISE_H
